import { deepMap } from '../../utils/collection.js'

import { factory } from '../../utils/factory.js'

const name = 'isInteger'

const dependencies = ['typed', 'equal']

export const createIsInteger = /* #__PURE__ */ factory(name, dependencies, ({

typed, equal

}) => {

/**

* Test whether a value is an integer number.

* The function supports `number`, `BigNumber`, and `Fraction`.

*

* The function is evaluated element-wise in case of Array or Matrix input.

*

* Syntax:

*

* math.isInteger(x)

*

* Examples:

*

* math.isInteger(2) // returns true

* math.isInteger(0) // returns true

* math.isInteger(0.5) // returns false

* math.isInteger(math.bignumber(500)) // returns true

* math.isInteger(math.fraction(4)) // returns true

* math.isInteger('3') // returns true

* math.isInteger([3, 0.5, -2]) // returns [true, false, true]

* math.isInteger(math.complex('2-4i')) // throws TypeError

*

* See also:

*

* isNumeric, isPositive, isNegative, isZero

*

* @param {number | BigNumber | bigint | Fraction | Array | Matrix} x Value to be tested

* @return {boolean} Returns true when `x` contains a numeric, integer value.

* Throws an error in case of an unknown data type.

*/

return typed(name, {

number: n => Number.isFinite(n) ? equal(n, Math.round(n)) : false,

BigNumber: b => b.isFinite() ? equal(b.round(), b) : false,

bigint: b => true,

Fraction: r => r.d === 1n,

'Array | Matrix': typed.referToSelf(self => x => deepMap(x, self))

})

})